Spring-box for switches, frogs, &amp; c.



No. 652,088. Patented lune l0, |900. w 000KE.

SPRING BOX FUR SWITCHES, FOGS, &0.

(Application filed Nov, 18, 1899.)

(N0 Model.)

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UNITED STATE-s PATENT OFFICE.

WARNER B. COOKE, OF JENKINTOWN, PENNSYLVANIA, ASSIGNOR TO THE WILLIAM WIIARTON, JR., it COMPANY, INCORPORATED, OF PHILADEL- PHIA, PENNSYLVANIA.

SPRING-BOX FOR SWITCHES, FROGS, 800.

SPECIFICATION forming part of Letters Patent No. 652,088, dated J une 19, 1900. Application led November 18, 1899. Serial No. 737,513. (No model.)

To all whom it nung concern.-

Be it known that I, WARNER B. COOKE, a citizen of the United States, and a resident of Jenkintown, Montgomery county, Pennsyl- Vania, have invented certain Improvements in Spring-Boxes for Switches, Frogs, tbc., of which the following is a speciiication.

My invention relates to certain improvements in spring-boxes for railway switches, frogs, &c.

The object of the spring-box is to keep the movable rail firmly against a fixed rail and yet allow the movable rail to yield when forced over by the flange of a car-Wheel passing between the fixed rail and movable rail.

The object of my invention is to improve the construction of spring-boxes, and this object I attain in the following manner, reference being had to the accompanying drawings, in which- Figure l is a plan view with the switchbox in section, illustrating.; my invention and showing the relation of the switch-box to the rails of the track. Fig. 2 is a transverse section on the line 22, Fig. l; and Figs. 3, 4, 5, and 6 are perspective views illustrating details of my invention.

In Fig. l I have shown a portion of a railroad-switch. A is the fixed rail, and A is the movable rail,which is held normally against the fixed rail by thepressure of the spring in the spring-box D. This spring-box is mounted upon a base-plate d, Fig. 3, which extends under the rails A A andacts as a support for both rails. The base-plate is secured to the fixed rail and to the box and also to the tie, so that the relation of the box to the rail A is fixed.

The spring-box is made from a single plate d, bent, as clearly shown in Fig. 4., to form the top and sides of the box and also to form flanges di, which are secured to the baseplate d by bolts d3, four in the present instance. The central openings in the baseplate and in the flanges are for the spikes for retaining the spring-box to the ties, as shown in Fig. l. The box is open at each end, and

adapted to rest within the box is a U-shaped support E for the spring. This support has lips e, which lap over the forward end of the spring-box, as shown iu Fig.l. To the rear end of this support F. is attached an adjusting-screw f, having a head by which it is turned, the threaded portion of the screw being adapted to a square washer or plate g, against which the spring G rests. The forward ends of the spring rest'against a square plate g'. This plate is perforated, and projecting through the plate is a stem h of a T- shaped projection I-I, which is secured to the movable rail A', as shown iu Figs. l and 2.

I have shown in the drawings two springs within the spring-box; but it will be under stood that one spring may be used without depart-ing from my invention.

The spring-box, the base-plate d, and the spring-support E are all made from sheet met-al, preferably steel, and are shaped to the proper form. Thus by this construction I make a very substantial box which will withstand the jars to which it is subjected.

The tension of the spring can be regulated simply by turning the screwfin either direction.

I claim as my inventionl. The combination in a spring-box for switches, &c., of a base-plate extending under .the rails of the structure, a plate bent to form the top and sides of a box, and having flanges by which it is secured to the baseplate, and containing the spring mechanism, substantially as described.

2. A spring-box for railway-switches, rbc., of a base-plate, a box made of sheet metal bent to form and having flanges by which it is secured to the base-plate, a spring-support, and a spring adapted t0 bear against a projection on the rail, substantially as described.

3. The combination of the base-plate, a box open at each end, a U-shaped springsupport having lips which overlap the front end of the box, a spring within the box resting against the U-shaped support and confined between the spring-support and a proj ection on the rail, substantially as described.

4. Thel combination of a base-plate, a box the perforation in the plate, substantially as consisting of a sheet of metal bent to form described. the top and sides and having flanges by In testimony whereof I have signed my which the box is secured to a base, a spring name to this specification in the presence of 5 supported Within the box, a plate or Washer, two subscribing Witnesses.

means for adjusting the plate or Washer, a spring resting against the plate or Washer, a WARNER B COOKE plate-at the forward end of the box against Witnesses: which the spring rests, and a projection on WILL. A. BARR ro the rail having a portion extending through JOS. H; KLEIN.v 

